Section 17-01: Lighting, Exterior
1994 Mustang Workshop Manual
DIAGNOSIS AND TESTING

Component Tests—Headlamps

 

Headlamp Switch

NOTE: A self-powered test lamp or ohmmeter will be required. Terminal identification used on test procedure corresponds with actual identification on headlamp switch.



Switch Terminals Switch Positions A Good Switch Will Indicate
B1 Off Open Circuit
and Park Open Circuit
H Head Closed Circuit
B2 Off Open Circuit
and Park Closed Circuit
R Head Closed Circuit
D1
and
D2
Thumbwheel rotated full left (in Detent) Closed Circuit
  Thumbwheel rotated right (Any Amount Out of Detent) Open Circuit
R
and
I
Thumbwheel rotated left from full right position Ohmmeter Will Show Smoothly Increasing Resistance

 

Headlamp ON Warning Chime

Refer to Section 13-09B.